中国物理B ›› 2016, Vol. 25 ›› Issue (1): 14204-014204.doi: 10.1088/1674-1056/25/1/014204

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Fiber fuse behavior in kW-level continuous-wave double-clad field laser

Jun-Yi Sun(孙骏逸), Qi-Rong Xiao(肖起榕), Dan Li(李 丹), Xue-Jiao Wang(王雪娇), Hai-Tao Zhang(张海涛), Ma-Li Gong(巩马理), Ping Yan(闫平)   

  1. Center for Photonics and Electronics, Department of Precision Instrument, Tsinghua University, Beijing 100084, China
  • 收稿日期:2015-06-04 修回日期:2015-08-04 出版日期:2016-01-05 发布日期:2016-01-05
  • 通讯作者: Ping Yan E-mail:pyan@mail.tsinghua.edu.cn
  • 基金资助:

    Project supported by the Key Laboratory of Science and Technology on High Energy Laser and China Academy of Engineering Physics (Grant No. 2014HEL02) and the National Natural Science Foundation of China (Grant No. 61307057).

Fiber fuse behavior in kW-level continuous-wave double-clad field laser

Jun-Yi Sun(孙骏逸), Qi-Rong Xiao(肖起榕), Dan Li(李 丹), Xue-Jiao Wang(王雪娇), Hai-Tao Zhang(张海涛), Ma-Li Gong(巩马理), Ping Yan(闫平)   

  1. Center for Photonics and Electronics, Department of Precision Instrument, Tsinghua University, Beijing 100084, China
  • Received:2015-06-04 Revised:2015-08-04 Online:2016-01-05 Published:2016-01-05
  • Contact: Ping Yan E-mail:pyan@mail.tsinghua.edu.cn
  • Supported by:

    Project supported by the Key Laboratory of Science and Technology on High Energy Laser and China Academy of Engineering Physics (Grant No. 2014HEL02) and the National Natural Science Foundation of China (Grant No. 61307057).

摘要:

In this study, original experimental data for fiber fuse in kW-level continuous-wave (CW) high power double-clad fiber (DCF) laser are reported. The propagating velocity of the fuse is 9.68 m/s in a 3.1-kW Yb-doped DCF laser. Three other cases in Yb-doped DCF are also observed. We think that the ignition of fiber fuse is caused by thermal mechanism, and the formation of bullet-shaped tracks is attributed to the optical discharge and temperature gradient. The inducements of initial fuse and formation of bullet-shaped voids are analyzed. This investigation of fiber fuse helps better understand the fiber fuse behavior, in order to avoid the catastrophic destruction caused by fiber fuse in high power fiber laser.

关键词: fiber lasers, high power lasers, laser damage

Abstract:

In this study, original experimental data for fiber fuse in kW-level continuous-wave (CW) high power double-clad fiber (DCF) laser are reported. The propagating velocity of the fuse is 9.68 m/s in a 3.1-kW Yb-doped DCF laser. Three other cases in Yb-doped DCF are also observed. We think that the ignition of fiber fuse is caused by thermal mechanism, and the formation of bullet-shaped tracks is attributed to the optical discharge and temperature gradient. The inducements of initial fuse and formation of bullet-shaped voids are analyzed. This investigation of fiber fuse helps better understand the fiber fuse behavior, in order to avoid the catastrophic destruction caused by fiber fuse in high power fiber laser.

Key words: fiber lasers, high power lasers, laser damage

中图分类号:  (Lasers)

  • 42.55.-f
42.55.Wd (Fiber lasers) 42.55.Xi (Diode-pumped lasers)